The FSR FL-1550 is a raised access floor box designed for wooden stages or computer floors. The hinged lid provides quick access to the inside of the box. On the lid is an additional hinged door that allows cables to pass through with the door closed. The cover is painted with a durable black sandtex paint that is skid proof.. Interior Configurations The box comes with an insert plate that accepts standard gang plates that can hold up to 4 gangs. The internal brackets can be arranged to provide numerous options for both high and low voltage applications using the two included gap fill and gang divider plates. The removeable gang divider plate makes passing cables through the compartments and providing power isolation easy, all supplied plates can be reconfigured at any time. Inside the box you will find ten knockouts Rear: (2) 1", 1 1/4", or 1 1/2"concentric, (2) 3/4" Bottom: (2) 1", 1 1/4", or 1 1/2"concentric Right/left: (2) 1" or 1 1/4"concentric Adaptable for Several Configurations and Easy to Install The box is extremely sturdy since it is a one piece all welded design. The top cover of the box is 13 1/2" x 9 1/2" and is 3/16" thick. To install cut a hole that is 12" x 8.15", then use four screws to secure to the floor. Specifications: Top: Black 3/16" thick cover Included 4 gang plate Hinged lid cover, with hinged lid opening in cover Depth: 6" 10 knockouts One piece all welded design Box size: 11 7/8" L x 8" W x 6" H Cover size: 13 1/2" L x 9 1/2" W Cutout size: 12" x 8.15" Max gang depth for components: 2 3/8" 1 year warranty FSR part # 17964 Not UL listed Made in the USA FSR FL-1550 Specifications (PDF) Specifications Top: Black 3/16" thick coverIncluded 4 gang plateHinged lid cover, with hinged lid opening in coverDepth: 6"10 knockoutsOne piece all welded designBox size: 11 7/8" L x 8" W x 6" HCover size: 13 1/2" L x 9 1/2" WCutout size: 12" x 8.15"Max gang depth for components: 2 3/8"1 year warrantyFSR part # 17964Not UL listedMade in the USA Downloads FSR FL-1550 Specifications (PDF)FSR FL-1550 Installation Instructions